too muCh ______ CAn possiBly lEAD to unhAppinEss, EvEn to thoughts oF suiCiDE As FEw pEoplE hAvE thE CourAgE to AnAlyzE thEmsElvEs oBjECtivEly AnD minutEly.
A．rEtrospECt
B．introspECtion
C．pErspiCACity
D．pErspiCuity